Door lock



G. HAGSTROM DOOR LOCK 4 Sheets-Sheet 1 Filed D90. 1, 1950 *5 E INVENTORATTORNEY G. HAGSTROM Dec. 15, 1953 DOOR LOCK 4 Sheets-Sheet 2 Filed Dec.1, 1950 m m V m ATTORNEYa.

Dec. 15, 1953 G. HAGSTROM 2,662,387

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Filed Dec. 1, 1950 4 Sheets-Sheet 3 G. HAGSTROM Dec. 15, 1953 DOOR LOCK4 Sheets-Sheet 4 Filed Dec. 1, 1950 INVENTOR.

ATTORNEY Patented Dec. 15, 1953 UNITED STATES ATENT OFFICE DOOR LOCKApplication December 1, 1950, Serial No. 198,557

29 Claims.

The invention relates to certain improvements in a door lock; and thenature and objects of the invention will be readily recognized by thoseskilled in the art in the light of the following explanation anddetailed description of the accompanying drawings illustrating what Inow believe to be the preferred embodiments or mechanical expressions ofthe invention from among various other embodiments, modifications,variations, combinations and constructions, of which the invention iscapable within the broad spirit and scope thereof as defined by theclaims hereto appended.

Primarily my invention is directed to those general types or classes ofdoor lock units or sets used mainly for outside doors, and which arecharacterized by a cylinder lock mounted in the outer knob with amanually operable push button or the like member mounted in the innerknob by the selective operation of which the outer knob may be eitherconnected with the latch bolt retracting spindle for latch boltactuation by the outer knob, or by which the outer knob may bedisconnected from the spindle and locked against rotation, so that, thespindle may then be rotated for latch bolt retraction only by keyoperation of the outer knob mounted lock unit. Door locks of thisgeneral class or type are in general use but their design andconstruction is mechanically and. structurally complicated, with highcost of manufacture and with operating and maintenance difficulties indoor installed operation and use.

One of the primary objects of my invention is to provide a design andconstruction of such type of door lock which is extremely simplestructurally and mechanically, with a minimum number of parts designedfor ready manufacture and ease of assembly, so that, the ultimate costof such a door lock unit or set to the user may be substantiallyreduced.

Another object is to provide such a low cost mechanically efiicientdesign and construction which will provide a door lock unit capable ofefficient, precision operation with a minimum of operational orstructural failures over a long life i dle, under the selective controlof the inner knob mounted push button.

A further object is to provide for simultaneous declutching of the outerknob from the bolt retracting spindle and locking of the outer knobagainst rotation, or conversely, simultaneous unlocking of the outerknob and clutching of such knob to the bolt retracting spindle.

Another object is to provide mechanism for automatically releasing theouter knob from the locked position thereof declutched from the latchbolt retracting spindle, by either the rotation of the inner knob or keyoperation of the outer knob mounted cylinder lock unit.

Another object is to provide means by which the automatic releasingmechanism may be rendered inactive, so that the outer knob will remainin latched position, declutched from the bolt retracting spindle, wheneither the spindle is rotated by the inner knob or is rotated by key op-1Elation of the cylinder lock unit in the outer A further object is toprovide a mechanically simple means for looking or latching the outerknob to a fixed plate on the door, comprising locking balls cammedradially outwardly into locking position by moving of a clutch memberfor clutching and declutching the outer knob to and from the latch boltretracting spindle.

A further object is to provide a design and construction of the outerknob mounted cylinder look, by which the cylinder plug of the lock maybe readily removed without the use of special keys or other implements,but merely by the partial disassembly and removal of the door lock setfrom installed position on a door, followed by simple manualmanipulation of the cylinder plug and associated mechanism.

With the foregoing and various other objects, features and results inview, which other objects, features and results will be readily apparentfrom the following detailed description, my invention consists incertain novel features in design and construction, and in combinationsand sub-coinbinations of parts and elements, all as will be more fullyreferred to and specified hereinafter.

Reierrrog to the accompanying ngs, in which similar reference charactersre r to corresponding parts and elements throughout the several figuresthereof:

Fig. 1 is a view in horizontal section through a portion of a door witha lock unit or set of the preferred form of my invention installedthereon, the lock unit and latch bolt unit associated therewith beingshown in top plan.

Fig. 2 is a View in vertical section taken as on 3 the line 2-2 of Fig.1, the outer knob locking mechanism and operating button member thereforbeing shown in projected, outer knob releasing position.

Fig. 3 is a. view in horizontal, longitudinal section through themounted door lock unit of Fig. 1, taken as on the line 33 of Fig. 2.

Fig. l is a view in horizontal, longitudinal section similar to Fig. 3,but showing the outer knob locking mechanism in depressed, outer knoblocking position.

Fig. 5 is a view in horizontal longitudinal section similar to Figs. 3and 4, taken through another modified form of door lock unit, in whichprovision for releasably catching the button operated push rod in itsdepressed, outer knob latching position, is eliminated.

Fig. 6 is a view in transverse section taken as on the line B6 of Fig.2.

Fig. '7 is a view in transverse section taken as on the line of Fig. 2.

Fig. 8 is a transverse sectional view taken as on the line 88 of Fig. 1.

Fig. 9 is a transverse sectional view taken on the line 9-9 of Fig. 2.

Fig. 10 is a transverse sectional view taken on the line lill of Fig. 2.

Fig. 11 is a transverse sectional view taken on the line lill of Fig. 2.

Fig. 12 is a transverse sectional view taken on the line i2-l2 of Fig.2.

Fig. 13 is a transverse sectional view taken on the line l3l3 of Fig. 2.

Fig. 1% is a transverse sectional View taken on the line I i-A i of Fig.2.

Fig. 15 is a transverse sectional view taken on the line ll5 of Fig. 2.

Fig. 16 is a transverse sectional view taken as on the line lE-i6 ofFig. 2.

Fig. 1''! is an exploded view or" the door lock and latch bolt units ofFig. 1, showing the parts of such units in perspective in separatedrelation.

I have selected and disclosed herein as examples, several embodiments ofdoor lock sets or units embodying the principles and various features ofmy present invention. The disclosed embodiments have been selectedprimarily for purposes of explaining the several features of theinvention and not by way of limitations in all respects to the specificconstructions of the example embodiments, or to the general types orclasses of door lock units in which such embodiments have beenincorporated. The door lock unit or set of each embodiment is shown asassociated with a tubular latch bolt unit, and comprises a rotatablespindle, mounting thereon inner and outer knob units by which thespindle may be rotated from either the inside or the outside of the doorto retract the latch bolt of the latch unit for door opening in thegeneral manner familiar in this art.

In terms of my present invention, each of these example embodiments ischaracterized generally by a key operated cylinder lock of the pintumbler type mounted in the outer knob unit; outer knob lockingmechanism operable selectively from the inside of a door to eitherconnect the outer knob to the spindle for spindle rotation thereby, orto disconnect such knob from the spindle and lock the knob againstturning, with the spindle then being rotatable from the outside of thedoor only by key operation of the knob mounted cylinder lock; and a pushbutton member mounted on the inner knob in operative association withthe outer knob latching mechanism for effecting operation of thatmechanism to either connect the outer knob to the spindle or todisconnect the knob from the spindle and lock the knob against handrotation or turning.

In one of the example embodiments, which may be taken for presentpurposes of this disclosure as the preferred embodiment, the inner knobmounted button member when in its projected position effects connectionof the outer knob to the spindle and when in its depressed positioneiiects disconnection of the outer knob from the spindle and the lockingof such knob against rotation. In this embodiment, the button member andouter knob latching mechanism when the button is in depressed positionare releasably held automatically in such position but are releasedautomatically to button projected position by either rotation of theinner knob or by key operation of the outer knob mounted look. Thisembodiment also includes means by which the button member and the outerknob latching mechanism can be releasably held in depressed, outer knoblatching positions, so that, rotation of the inner knob or key operationof the outer knob mounted lock will not effect automatic release andresulting unlatching of the outer knob. Such means permits of manualoperation selectively by the operator to either effect locking of thebutton member against automatic actuation of the outer knob latchingmechanism or to restore such mechanism and button member for automaticfunctioning to release from outer knob latching position by inner knobrotation or key operation of the outer knob mounted lock.

In another of the example embodiments hereof, the provision forretaining or locking the button member in its depressed, outer knoblocking position, is eliminated, so that the button member is alwaysreleased automatically from its depressed, outer knob locking positionby either rotation of the inner knob or key operation of the cylinderlock in the outer knob.

In the other of the example embodiments, the provision for retaining andlocking the button member in its depressed, outer knob locking positionwhenever it is depressed from projected position and for automaticallyrestoring the button from depressed to projected position unlatching theouter knob, upon either inner knob rotation or operation of the outerknob mounted lock, is eliminated. However, provision is made in thisembodiment for manually locking the button member in its depressedposition to maintain the outer knob locked against rotation under allconditions of operation of either the inner knob or the lock in theouter knob, with the button mem-- ber being only releasable fromdepressed, outer knob locking position by manual operation thereof bythe operator.

In the example embodiment as disclosed in Figs. 1 to 3, and which isoffered here as the preferred embodiment, the door lock unit or set isshown in Fig. l in mounted and installed position on a door D inoperative association with a tubular latch bolt unit L. The door lockunit or set includes the spindle it] of square or angular section, whichis mounted in position extended through a transverse bore or passage 2formed through the door, with an inner knob unit I mounted on thespindle end at the inner side of door D and an outer knob unit 0 mountedon the spindle end at the outer side of the door. The tubular latch boltunit L of this example is mounted in the door D in a suitable bored ormortised opening 3 formed therein and opening through the outer freeedge of the door D, with the unit L being disposed in position with itslongitudinal axis perpendicular to the axis of spindle iii and with thespindle being extended transversely through latch bolt unit L inoperative connection therewith for retracting the latch bolt B of unit Lupon rotation of the spindle by either inner knob unit 1 or outer knobunit 0, in the manner generally familiar in this art. Referring to Figs.8 and 17, the latch bolt unit L is of the tubular type and includes aroll-back 5 having a squared opening through which spindle i6 extendsand is engaged, a spring loaded yoke 53 reciprocally mounted in the unitand operatively connecting the rollback 5 with the latch bolt B, whichlatch bolt is reciprocally mounted in the unit for projection andretraction through one end thereof to be engaged in or disengaged fromthe usual keeper of a striire plate '3 (see Fig. l). The latch bolt 3 isspring loaded and in the usual manner of the is depressibleindependently of yoke but retractible by the yoke.

The structure for mounting a door lock unit or set on the door D inaccordance with my invention, provides for ready adjustment of the unitto doors of varying thicknesses, and, in this instance, comprises a backplate I l located on the inner side of the door across spindle receivingbore 2, and a lock plate 28 located at the outer side of the door acrossthe outer end of spindle receiving bore The back plate i i is providedwith a bore Ha having an internal diameter greater than the externaldiameter of spindle is, for receiving the spindle in position extendedtherethrough. The lock plate 29 is formed with a hub or collar-forming,annular flange 2d extended from the outer side thereof and providing abore therethrough and through the plate for receiving the outer endlength of the spindle it which extends therethrough in assembledposition of the unit. The internal diameter of the hub or collar 2 oflock plate 26 is substantially greater than the external diameter ofspindle In for a purpose to be hereinafter referred to in detail.

The lock plate 2t includes the spaced, generally parallel arms 25extended laterally inwardly from the inner side of plate 2i] at oppositesides of the spindle receiving bore through the plate, with these armsbeing extended into the bore or passage 2 in door D. The arms 2| areprovided at their inner ends with the inwardly facing, spaced positioninflanges 22 between which the latch bolt unit L is received. The innerends of arms 2! are provided with lugs 23 bent inwardly therefrom andbeing disposed generally parallel with the body of plate 29. Each of thelugs is provided with a tapped bore 223a therethrough (see Fig. 17)having its axis generally parallel with the axis of the bore throughplate Ell. The back plate H and the lock plate 2? in mounted positionsare connected and drawn tightly together against the outer and innersides of door D over and across the adjacent end openings, respectively,of the bore or passage 2, by the threaded and headed bolts or longscrews l2 which are extended inwardly through smooth Wall bores l in(see Fig. 17) formed in back plate M, with the threaded inner ends ofthe screws being threaded into the tapped bores 23a, respectively, oflugs 23 of the lock plate Ell. Thus, by such construction andarrangement of back plate ii, lock plate 29 and fastening screws 12, alock unit may be readily mounted on doors of varying thicknesses bymerely threading screws it the required distances into or from the lugs23 to draw plates II and 26] inwardly toward each other to securelyclamp the plates on and against opposite sides of the door in accordancewith the door thickness.

An inner rose i i is provided for mounting on and over the opposite endsof back plate II by a pressed or snap fit, while an outer rose i 5 isprovided for mounting on and over the opposite ends of lock plate 28 bysnap or pressed fit. With the inner and outer roses M and i5 in mountedpositions attached on plates l i and 2d, the ends of the spindlereceiving bore 2, the plates and the fastening screws l2, are allenclosed within and concealed from view by the roses.

The spindle is, which in this instance is of square section isexternally threaded along its inner end length and the inner knob unit Iis threaded onto and locired in position thereon. In this example, innerknob unit I includes a hub member or insert 35% having an internallythreaded axial bore 380: therethrough by which this hub or insert memberis threaded onto spindle iii, The hub member 3B is formed with a tapped,radial bore therethrough into which is threaded a lock or set screw 35for releasably locking the hub member knob unit in the desired posi tionof adjustment axially of spindle iii. The inner knob unit includes anannular shank 32 which is secured on and around hub member 38, with theinner end of the shank bent radially inwardly over and around the innerend of the hub member. The inner rose Id is formed with an axial boretherethrough having an inturned, annular flange i i-a therearound whichdefines and provides a, bearing member into which is rotatably receivedthe inner end of hub member and the inturned nange portion of the shank32. The inner end of hub member and the inturned flange portion of shank52 secured therearound are of reduced external diameter relative to thehub member and the shank. Shank 32 of knob unit I is flared radiallyoutwardly and has its outer, annular edge portion formed to provide a.flange therearound into which the inner annular edge of the knob formingcap 33 is secured. Knob-forming cap 33 is formed at its outer side withan axial bore 33a therethrough in axial alignment with spindle it.

The inner knob unit I mounts the button member til by which themechanism for connecting the outer knob to the spindle iii and fordisconnecting such knob from the spindle and latching the knob to thelock plate against rotation, is selectively manually controlled by theoperator. In this example, in accordance with my invention, the buttonmember til is operatively connected with such mechanism thr h the mediumof a push rod or plunger 5i? which is reciprocally mounted in andextends through an axial bore Elia extending through spindle it; fromend to end thereof. This push rod Ed is formed at its outer end with anenlarged external diameter head 5i which is provided with externalthreading 52 having the lead as the external threading of spindle id.The external diameter of the threading 52 of head is slightly less thanthe internal threading of the bore 5553a of hub member so, so that, thehead as ma slip freely through the hub member bore. The outer endportion of hub member as is formed of reduced external diameter and acylinder-forming tube 53 is secured in position at its inner end on andover such reduced diameter portion of hub member 30. Tube 53 is of alength to extend outwardly into the cap member 33 of the knob unit I tothe inner side of the cap member around and surrounding the buttonreceiving bore 33a in the outer side wall thereof.

The button member 40 is of tubular form open at one end and closed atthe opposite end by an end wall llld formed to provide thereacross atransverse rib 45b to provide a finger grip to facilitate turning orrotation of the button memher. The button member MI is provided withdiametrically opposite bores 400 through the side wall thereof, as willbe clear by reference to Figs. 2 and 17. The button member 40 is mountedin a sleeve member il which is open at one end for receiving therein thebutton member in telescopic relation therewith. Sleeve member 4| isclosed at its opposite end by an end wall 2 having an internallythreaded, axial bore 42a therethrough into which the externally threadedhead 5! of push rod 58 is threaded to thereby adjustably attach thesleeve ii and its contained button 49 to the push rod 58. In assembledposition button 48 is secured in sleeve ll against displacement with theclosed end of the button member provided with the finger grip 1 boutermost and the inner open end of the button member located at theinner side of end wall 42 of the sleeve 4|.

In this example, I secure button member 4E in position in sleeve 4! bymeans of a U-shaped sertcd in button member 40 with the closed endthereof located at the closed end of the button, and with the fingers44a and 44b thereof received in the diametrically opposite bores 1-00,respectively, of the button member. The circular side wall as of sleeve4 I, referring now to Fig. 17, is provided with a bore 430: through aside wall thereof. Diametrically opposite bore 5311 the side wall 43 ofsleeve ll is provided with an axially disposed slot 43?) which extendsfrom end to end of the sleeve, so that, it opens at its opposite endsthrough the forward end edge of the sleeve and through the rear face ofthe end wall 52 of the sleeve. The long finger 44a of the buttonretaining member in is of a length to project outwardly through the sidewall of the button, and r in mounted, assembled position of the buttonmember the finger 44a engages in the side wall bore fllta of sleeve 4!to thereby retain the button member in the sleeve against displacement.The side wall 53 of sleeve 4! is cut away or recessed to form what is ineffect a circumferentially disposed, bayonet slot 35 perpendicular toand opening at one end into the slot 43b. The slot 45 provides along itsinner side a guiding edge or shoulder like, as clearly shown in Fig. 17.

The sleeve d! is slidably mounted and confined in the outer end of thetube 53, which extends between inner knob hub member 39 and the end wallof the knob, cap with the button member til positioned projectedoutwardly through the bore or opening 33a in the cap. The push rod 50extends outwardly into tube 53 with the threaded head thereof threadedinto the bore 42a of the end wall of the button mounting sleeve. Thus,sleeve and button member 40 are reciprocal in tube 53 as a unit toproject and retract the push rod 53 connected thereto.

In this example embodiment of my invention, I provide for rotation ofsleeve M as a unit with button member 4!! in tube 53 on and relative totube push rod 50. The rotation provided for is a 11mited one and amountsto approximately a quarter turn counterclockwise of the button whendepressed to rotate it to locked position and a quarter turn clockwiseto rotate it from locked position. The limitation and confining of thisrotary movement is effected through the medium of a finger or lug 45which is bent inwardly from the side wall of tube 53 and which isengageable in the slots 43b and 45 formed in the side wall of sleeve ill(see Figs. 2 and 17). In normal operation, lug 36 is received in slot431) and confines the button member and its mounting sleeve M tostraight line reciprocation axially in tube 53 as the button and pushrod 50 are depressed or projected. When button member 40 and sleeve 6|are in depressed position, the slot 45 of sleeve M is aligned with thelug 4B of tube 53. Hence, if it is desired to lock or hold the buttonmemher and push rod 58 in depressed position, it is only necessary torotate button member 40 and sleeve ii counter-clockwise, so that lug 46then moves into slot is and upon release of the button member will beengaged by shoulder 45a to prevent projection or outward displacement ofthe assembly of push rod 58, sleeve 4| and the button member. Clockwiserotation of the button memher do from this locked position wil returnsleeve 4! to position with the slot 43b thereof lined up with lug it, sothat, the button member and its sleeve together with push rod 50, maythen move outwardly as a unit in tube 53 to projected posi tion withpush rod 5% retracted.

The button member 40, sleeve 4| and push rod 58 connected therewith, arecontinuously biased outwardiy through tube 53 to the projected positionof button member 48 and the retracted position of push rod 56, as shownin Fig. 3, by the biasing springs 55' and 55. Spring is a coil springmounted in position in tube 53 under comression between the outer end ofhub member and the inner side of end wall 42 of button mounting sleeveii. Spring d5 has an external diameter to slidably engage the innersurface of 555. Spring thus continuously acts to project sleeve 41outwardly to position with the outer open end edge thereof engagedagainst the under side of cap 33 which forms a limiting stop therefor.The spring 55 is of the coil type having an internal diameter to fitover and slidably engage push rod 50, and is mounted on the push rodunder compression between the outer end of spindle It and the annularshoulder presented by the inner end of the externally threaded head 55of push rod 50. It will thus be noted that sleeve 4! can be threadedaxially of push rod. to toward and from spindle l0 and knob hub 39without thereby varying the distance between the inner end of head 5|and the outer end of spindle it, so that, adjustments of the knob unit Iand button it, on and relative to spindle it, may be made withoutvarying the degree of compression of spring 55. Springs and 55 thustogether load sleeve 4! and push rod 56 to continuously bias thesemembers with the button member is, outwardly to normal projectedposition thereof. Button member 4a and sleeve 4! may be depressed as aunit from projected position to thereby force push rod 58 inwardly,against the combined forces of the springs 45 and 55.

Attention is here directed to the fact that by providing the externalthreading 52 of head 5| of the push rod with the same lead as thethreading of spindle II] in knob hub member 30, the same spacing withbutton 40 in projected position is maintained between spindle lll andthe inner end wall 42 of sleeve 4!, irrespective of the axial positionof adjustment of inner knob unit I on spindle iii. In this manner themaximum position of projection of button All outwardly from knob unit Iwill remain the same in any position of adjustment of the knob unit onspindle id to meet the conditions of installation on doors of differentthicknesses.

The outer knob unit includes an insert sleeve (it on which the annularshank 6! of the knob unit is secured with the sleeve member extendedoutwardly a distance beyond this shank. Shank Si is radially outwardlyflared and has secured to the outer annular edge flange thereof the knobcap 62. Knob cap 62 is provided with an axial, circular opening 62atherethrough in axial alignment with the inner end of the hub-forming,insert sleeve til. Sleeve cs terminates at its outer end within cap 62spaced a distance inwardly from the inner side of the outer end wall ofthe cap. The knob unit 0 with the lock unit in mounted, installedposition on the door D, has the outwardly projected length ofhub-forming sleeve 68 of the knob unit extended through an axial openingits formed through outer rose is, and through the lock plate 23], withthe insert sleeve Elli rotatably received in and extended through thehub forming flange 2 of the lock plate. In this mounted position, thespindle ill extends a distance into knob insert sleeve 6%, which sleevehas an internal diameter greater than the maximum effective externaldiameter of the spindle. Referring now to Fig. 1'7, in connection withFigs. 2 and 3, the open inner end of knob insert sleeve on whichreceives the spindle ill, is provided with an inturned flange portionwhich provides at its opposite ends the clutch teeth forming shoulders65. The radial depth of the flange B5 is such that the flange is spacedfrom and does not en age spindle iii, so that the spindle and the knobunit 0 with its insert sleeve G9, are rotatable relative to each otherin the absence of connecting means therebetween.

The outer knob unit 0 may be secured against inward displacement onspindle iii, by a retaining ring iiilb removably mounted on the spindleat the inner end or insert sleeve Ring Sill) may be seated in suitablenotches Etc formed in the spindle id. Displacement of knob unit 0outwardly on spindle It may be restrained by a suitable ring secured inan annular seating groove tile formed around insert sleeve 6% at theinner side of lock plate (see Figs. 2 and 1*?) By my present invention Ihave provided a clutching mechanism actuated by push rod under thecontrol of the button member til, for bly connecting the insert sleeveis of the out knob unit 0 with the spindle it, so that rotation of knobO in either direction will effect rotation of spindle it to retractlatch bolt B of the latch bolt unit L. In the examples hereof, I haveexpressed th s mechanism in the form of a clutch sleeve 'lil having asquared, axial passage 'Ei therethrough which is dimensioned to slidablyreceive the square section spindle Id. sleeve to is of circular externalcontour and slidably mounted on spindle it for rotation with thatspindle in any position of adjustment axially of the clutch sleeve onthe spindle. Referring to l'l, in connection with Fig. 13, clutch sleeveto at the inner end thereof is cut away across one thereof for adistance inwardly from the rear or inner edge of the sleeve to providethe spaced clutch teeth forming shoulders or edges 52, which Clutch 10are complementary to and adapted to be engaged with the clutchteeth-forming shoulders 66 at the inner end of knob insert sleeve Gil.

The clutch sleeve it is mounted on spindle id in position located withinthe knob insert sleeve til with the cutaway end thereof which providesthe clutch teeth-forming shoulder 52, inn rrnost and adjacent the clutchteeth-forming shoulders 66 the inner end or" insert sleeve ti Clutchsleeve it has an external diameter such that it may be freely movedaxially of spindle ill within insert sleeve as, between a position movedrearwardly with shoulder thereof engaged With shoulders 35,respectively, at the inner end of insert sleeve to, and a position movedoutwardly on th spindle with the shoulders "62 completely disengagedfrom shoulders of the insert sleeve. When the clutch sleeve it is in itsinwardly moved position in clutching engagement with insert sleeve til,the outer knob unit 0 is then connected with spindle iii through theengagement of the squar section spindle in the square passage ll ofclutch sleeve "50, so that rotation of the outer knob unit 0 in eitherdirection will correspondingly rotate the spindle I E3 to therebyretract latch bolt B. When clutch sleeve it is displaced outwardly onspindle ill to position with the teeth-forrning shoulders l2 thereofdisengaged from the teeth-forming shoulders 65 or" insert sleeve cc,then outer knob unit 0 is disconnected from the spindle and the spindlemay be rotated independently of the outer knob unit.

The clutch sleeve it is displaced axially in either direction on spindleit between position clutching outer knob unit 0 to spindle ill andposition ole-clutching the knob unit and spindle, by means of the pushrod 58. I effect such operation of clutch sleeve Ed by providing a slot'53 transversely through spindle ill with this slot opening through theouter end of the spindle and being extended inwardly a distancetherefrom inwardly through the spindle. A pin it is secured at itsopposite ends in diametrically opposite bores formed through the clutchsleeve ill, with this pin extending across square passage ll of thesleeve and through the slot T3 in the spindle it. The push rod 56extends completely through the spindle iii and projects at its outer enda distance outwardly beyond the spindle to a location Within the knobinsert sleeve til. Th pin 76 i extended through a suitable bore formedin push rod 56, so that the clutch sleeve is is thereby secured tothepush rod. Thus, the clutch sleeve id will be displaced axially ofspindle I by axial movements inwardly or outwardly of the push rod inthe bore idea of the spindle. The mounting and positioning of clutchsleeve "ill and pin ill relative to each other and to push rod 56 andspindle ill, is such that with the push rod in retracted position withthe button member id projected from inner knob unit I, the clutch sleeveit will be in position in clutched engagement with the insert sleeve on,but with push rod 58 projected into outer knob unit 0 by depression ofbutton member the clutch sleeve will be moved outwardly on spindle it toposition in the inner end of insert sleeve so with the clutchteeth-forming shoulders F2 thereof declutched and disengaged from theteeth-forming shoulders 68 of insert sleeve 63.

When the clutch sleeve 'ii] is moved outwardly in insert sleeve til onspindle id to position deolutched from the insert sleeve and knob unit0, I provide a locking mechanism for locking the head outer knob unit 0against rotation, which 11 mechanism functions automatically by theoutward movement of the clutch sleev to declutched position. Referringto Figs. 12 and 1'7, diametrically opposite bores are formed through theinner end portion of insert sleeve 60 at locations such that the clutchsleeve ii! is always positioned in the insert sleeve between thesebores. In each of these bores I locate a locking ball 15. The diameterof each of the balls 16 is greater than the thickness of th side wall ofthe insert sleeve member 60, while the diameter of each of theball-receiving bores 15 is slightly greater than the diameter of theballs, so that the balls may freely move axially, inwardly and outwardlythrough the bores and radially relative to and through insert sleeve 60.Conical camming recesses ii are formed in the outer side of clutchsleeve id at diametrically opposite locations thereon. In the normalposition of the door lock unit with the latch bolt B projected and thebutton member 59 and push rod 59 in normal projected positions, thecamming recesses Tl ar opposite and axially aligned with the ballreceiving bores Til of insert sleeve ti so that, the locking balls '76may be received and seated in such recesses. This position of the balls76 is clearly shown in Fig. 12. The diameter of each of the lockingballs 16 is the same, and is such that when these balls are in positionsseated in camming recesses ll, they have a loose bearing engagement attheir outer sides with the inner surface 2 3a of the hub-forming sleeve24 of lock plate 253. This inner surface 23a is concentric with theexternal surface of the clutch sleeve Ell, there being a clearancebetween these surfaces. Thus, in such position the inner end length ofinsert sleeve 60 which extends through locking plate 20, is freelyrotatable in and relative to that plate and its hub-forming flange 24,for rotation of the outer knob unit in either direction to rotate thespindle It] to retract latch bolt B.

When the clutch sleeve is moved axially of spindle iii from its positionwith the locking balls it received in the camming recesses 71, thelocking balls will be cammed or forced by the cammin recesses radiallyoutwardly through the ball receiving bores in the insert sleeve 60. Iutilize this action to eifect locking of the outer knob unit 0 to thelock plate 29 against rotation when the clutch sleeve H! is movedoutwardly on spindle ill by depression of button member ii to thusdeclutch and disconnect the knob unit 0 from the spindle Hi. In theexample embodiments here disclosed, I provide ball receiving, lockingrecesses 18 in the hub forming flange 24 of the locking plate 20. Theserecesses ii? are located at diametrically opposite positions in flange24. The recesses are disposed longitudinally of the flange relative tothe axis thereof and are open at their inner sides facing the clutchsleeve 18. For instance, such recesses may be formed by outwardly bentor pressed channel portions 18a on the flange.

In normal position of the door lock mechanism, the locking recesses 18are located opposite and in position for receiving thereinto the lockingballs is, respectively. Thus, when clutch sleeve E8 is moved outwardlyon spindle Hi to position declutching or disconnecting outer knob unit 0from the spindle, the balls 16 are cammed radially outwardly into thelocking recesse I8 and are constrained against displacement radiallyinwardly therefrom by the outer surface of the clutch sleeve H1. Thediameters of the looking balls 56 relative to the internal diameter offlange 24 and the external diameter of clutch sleeve [9 is such thatwith clutch sleeve displaced to position with the balls '56 cammed intothe locking recesse 78, the balls will have rolling bearing engagementat their inner sides with the external surface of clutch sleeve 10. Uponmovement of the clutch sleeve l0 inwardly on spindle it by the push rod50 to the normal projected position of the push rod and button member40, the outer knob unit 0 is again clutched to spindle l6 and thelocking balls "l8 are lined up with camming recesses ll, so that outerknob unit 0 may then be rotated to rotate spindle i0.

In the example embodiment of Figs. 1 to 3, a spring catch means isprovided for automatically engaging and releasably retaining the pushrod 56 in its position outwardly projected by depression of buttonmember 43. Such spring catch mean in this example, takes the form of apair of spring arms which are suitably mounted and located in insertsleeve 60 of the outer knob unit 0 in positions spaced apart ingenerally paiallel relation and being extended rearwardly to the outerend of spindle Id and the adjacent free end of push rod to. The innerends of arms 60 are bent inwardly toward each other to provide theconverging, inclined spring fingers 8 I. These spring fingers arelocated at the opposite sides of the axis of push rod 5 with the outerend of the push rod adapted to be engaged therewith. The outer end ofpush rod 53 is formed flattened at opposite sides 82 thereof and theouter end of the rod is formed to provide an arrow-head 83 providing atopposite sides thereof the laterally outwardly projected shoulders 8311.In normal projected position of button member =58 with the push rod 55in its retracted position clutching outer door knob unit 0 to spindleiii, the arrowhead 83 forming the outer end of the push rod ispositioned between the converging spring fingers ill of arms 85.3 withthe nclined opposite side edges of head 83 engaged with the adjacentinclined sides of the converging spring fingers 8i, as will be clear byreference to Fig. 3. When, however, button member 4|] is depressed andpush rod 50 is projected outwardly to declutch the spindle Hi from outerknob unit 0 and, lock the latter unit against rotation, the arrow-head83 is forced outwardly between spring fingers 8|, forcing these fingersapart until their ends snap into positions behind the arrow-head 83engaged with the shoulders 83a. This position of push rod 59 and head 83is shown in dotted lines in Fig. 3. When the arrow-head 83 of push rod56 is thus engaged by the spring fingers 8|, the push rod is constrainedand held in such position against retraction under the action of thebiasing springs 45 and 55.

Push rod 59 is released automatically from position engaged by springfingers ill, by either rotation of the inner knob unit I relative to thespring fingers, or by rotation of the spring fin gers relative to thepush rod and its arrow-head 83. For example, when inner knob unit I is1'0- tated, the spindle ii) and push rod 50 will be likewise rotated andsuch rotation will turn the arrow head 83 through approximately 99 tothereby turn the shoulders 83a thereof out of engagement with the endsor" the spring fingers BI such spring finger ends then engaging againstthe flat sides 82 of head 83. As soon as push rod 50 and its arrow-head83 have assumed this position, the push rod is released and the springs45 and 55 function instantly to project button member 40 and retract thepush rod to it position unlocking outer knob unit 0 and clutching thatunit to the spindle it. In the same manner push rod 59 is releasedautomatically from the spring fingers iii by rotation of arms Si? toposition the fingers at the flat sides d2 of the push rod arrow-head Theouter knob unit mounts therein a key operated cylinder lock. or the pintumbler type for eifecting rotation of spindle Iii to retract the latchbolt when the outer knob unit been latched or dogged inst rotation bydepression of the button member 13 in the inner lrnob unit I at theinside of the door. This cylinder lock embodies variou features or mypresent invention, both in its combination with and relatiom ship in thedoor lock unit or set and in its design and construction as a cylinderlock of the removable plug type. This cylinder loch the form thereofdisclosed herein, as adapted to the example embodiment of door lockunits of the invention, comprises rsically a cylinder body iili having adriver pin case llil extended longitudinally therlong outwardly from onside thereof, and a cylinder plug P which is rotatably mounted in thebody ltd and which provided with the usual keyway or slot K openingthrough one side of the plug for receiving therein an operativeReferring to Figs. 2 and 17, the cylinder body iilii is of tubular formproviding a circular bore or opening 592 extending axially therethroughand opening through the opposite ends of the body. The cylinder bodyiiiii is provided with a series of spaced bores i852 there-through alongthe under side of an opening into driver case tail for reciprocalprojection therethrough of the usual spring loaded driver pins itsreciprocally mounted in the driver case. Diametrically opposite drivercase iGl, the cylinder body Hill is provided with a rib formation iiiiiextending longitudinelly therealong and projected outwardly therefrom toform at the inner side thereof a groove Edd opening at its opposite endsthrough the ends of the cylinder body and being provided with spacedbores it? therethrough actually aligned with the bores at the drivercase side of the cylinder body. This groove 1% is open at the inner sidethereof throughout its length into the bore Hi2 of the cylinder body.The cylinder body we is mounted in assembled position within the outerknob unit 0 by securing the inner end of the body to the outer end ofthe insert sleeve In example, insert sleeve Gi is formed withdiametrically opposite recesses or slots therethrough (see 2) whichreceive therein the inner end portions of driver case tilt and ribrespectively, of the cylinder body. The forward end portion of insertsleeve lid is formed with an internal diameter to snugly receive thereinthe rear, externally cylindrical end portion of the cylinder body liiii.The cyl inder body is thus rigidly held in assembled position in knobunit 0 with the body being disposed and enclosed within knob cap 62 andthe forward open end of the body being located adjacent the inner sideof and axially aligned with the opening 3.2g in the cap.

In accordance with a feature of the invention, the cylinder plug P isassembled with and is adapted to rotate an actuator sleeve lit, by whichrotation of the cylinder plug by a key inserted therein will effectlatch bolt retracting rotation of the spindle id. This actuator sleeve 1i d the example embodiment, formed as a cylinc l, tubular member havinglongitudinal slot iii through one side thereof and being extended to andopening through opposite ends of the sleeve. The actuator sleeve iii?has an external diameter to be rotatably received and journaled in bore582 of cylinder body Hid. In mounted position or the actuator sleeve litin cylinder body Hit, the sleeve extends completely through bore N32with its forward end at the forward or outer end of the cylinder bodybut with its inner end portion projected a distance inwardly into theinsert sleeve beyond the inner end of the cylinder body Hill. At itsinner and actuator sleeve H ii is provided with a pair of rearwardlyextended teeth H2 positioned at op posite sides of slot ill indiametrically opposite locations on the sleeve. The spindle is isprovided at the outer end thereof with a head lid which is suitablyfixed thereto, and which is provided with an axial bore or opening I 5athrough which the push rod 50 extends. For attachment to the spindle Hi,the head H t may be provided with the slots l Ma to receive therein thetongues li lb formed on the end of the spindle (see Fig. 17). This headi H! is provided with a pair of forwardly extended teeth H5 located atdiametrically opposite positions on the head. The actuator sleeve iii}extends inwardly into insert sleeve till a distance to locate the teethi 52 thereof in positions for engaging upon rotation of the sleeve, theforwardly extended teeth HE of spindle head H4, as will be clear byreference to Fig. 11 in connection with Figs. 2, 3 and 17. In normalposition, the pairs of teeth H2 and H5 are approximately apart, so thatupon rotation of the actuator sleeve Ill! through the required number ofdegrees, the teeth H2 thereof will engage the teeth N5 of spindle headEM, and upon further rotation of sleeve lit in the same direction thespindle iii will be rotated thereby.

The cylinder plug P is formed at the forward end thereof with a radiallyextended flange iiiii therearound for engagement against the forward endedge of the actuator sleeve Hi3, when the plug P is mounted in assembledposition in the sleeve. The key slot K open through the forward flangedend of plug P in the usual manner familiar in this art. Along one sidedisposed longitudinally thereof from the end flange lid to the inner endof the plug P there is formed a rib portion i2! having a width to beslidably received in the longitudinal slot iii of the ao tuator sleeveH0. The outer face or surface mm of the rib portion HE is formed on aradius transversely thereof, such that surface i2ia with the plugmounted in the actuator sleeve llil, lies in the plane and forms acontinuation of the cylindrical outer surface of the sleeve. A series ofspaced bores 12% are formed in along the rib portion E21, which boresopen at their outer ends through the outer surface of such rib portionand at their inner ends open into and along the key slot K. These boresiii: are so located and spaced as to be axially with the bores i525which open through body tilt from the driver case 18!. Bores E22 areadapted to reciprocally mount therein the tumbler pins H23 in thegenerally conventional manner for this type of tumbler pin lock.

The opposite longitudinal sides rib 52E are adapted to engage theadjacent longitudinal side edges of the slot iii in the actuator sleevel iii, to thereby form the operative connection between the plug and thesleeve for rotation of the latter by hey rotation of the plug. Thecylinder plug P has a length greater than the length of the cylinderbody we and in mounted, assembled position of the actuator sleeve HQwith the plug P therein, the plug extends a distance inwardly throughthe sleeve beyond the inner end of the cylinder body but terminating adistance spaced inwardly from the inner end of the sleeve. A fixed pinor log M25 is formed from, or as a separate member secured in andextends radially outwardly from the rib portion I21 of plug P inposition to slidably engage against the inner end edge of the cylinderbody Hit in the assembled position of the actuator sleeve H8 and plug Pin the cylinder body. The outer end of insert sleeve is formed ofenlarged internal diameter to provide an annular space i25a forreceiving pin I25. In this manner the plug P is secured against outwarddisplacement in or removal from the actuator sleeve, while being freelyrotatable as a unit with that sleeve in the cylinder body Hill.

In the example hereof, the spring catch means comprised by the springarm 88, is mounted on and is rotatable as a unit with the cylinder plugP. This is effected by providing a bore 85 through cylinder plug Pbetween the inner end thereof and the inner end of the cylinder bodylllfl, with the opposite sides of the plug being provided withlongitudinally disposed grooves 85 extending across the opposite ends,respectively, of bore 85. Grooves 85 extend to and open through theinner end of the plug. Each of the spring arms 80 has the end thereofopposite the spring finger ill bent laterally to provide a mounting leg81. The spring arms at are mounted on and secured to the plug '1? byseating the arms in the grooves 86 With the mounting legs 3? thereofbeing extended into the bore 85 and with the spring fingers 8| of thearms in positions projected rearwardly or inwardly from the plug. Whenthe plug P is in mounted, assembled position in the actuator sleeve 122,the spring arms 86 are secured and maintained in proper assembledposition against displacement so as to be rotatable with the plug as aunit for functioning in the manner hereinbefore described.

With the door lock unit or set of the preferred eznbodi nent of Figs. 1to 3, in installed and mounted position on a door D, when button memberdo in the inner knob unit I is in projected position, the push rod is inretracted position with the clutch sleeve is engaged with the insertsleeve of the outer knob unit and with the arrow-head 83 of rod 55) ininactive position disengaged from the spring catch arms 88. Under suchconditions the latch bolt retracting spindle is rotatable by either theinner knob unit I or the outer knob unit 0 for latch bolt retraction, sothat the door D may be opened from either side by solely knob operation.

When it is desired to latch or dog the outer knob unit 0 againstrotation, so that the door cannot be opened from the outside except bythe use of a key to unlock the cylinder lock in the outer knob unit, thebutton member 4% is depressed in the inner knob unit I. This depressionprojects push rod 5-9 outwardly to move clutch sleeve 39 to positiondisconnecting or declutching outer knob unit 0 from spindle iii, and atthe same time eifects displacement of the locking balls ll; into lockingengagement in the lock plate 29 to thereby lock outer knob unit 0against rotation. {he projection of push rod 5!! to such positionengages the arrow-head 83 thereof in looking relation with spring arms80, so that the push rod and button member 46 are releasably locked insuch position with the outer knob unit 0 locked against rotation. Withthe outer knob unit 0 locked, then door opening, latch bolt retractionof the spindle It from the outside may only be effected by key operationof the cylinder lock in the outer knob unit. Insertion of the proper keyin the key slot K of the lock cylinder plug P will set the tumbler pinsI23 and driver pins I94 in the usual manner for rotation of plug P inthe lock. Rotation of cylinder plug P rotates actuator sleeve Hi! sothat the teeth I I2 thereof engage the teeth I [5 on spindle head I Mwith resulting rotation of the spindle and retraction of the latch bolt.

In this preferred exampled embodiment, when the button member 49 isdepressed with the outer knob unit latched or dogged against rotation,the door D may be opened by latch bolt retracting rotation of the innerknob unit I. Rotation of the inner knob unit will rotate push rod 50with spindle Hi and turn the arrow-head 83 into position released fromspring arms 86, whereupon the push rod and button member it will snapback to normal position. Similarly, upon key operation of the cylinderplug P, the arrow-head 83 of push rod 50 will be released from thespring arms by rotation of those arms with the actuator sleeve l W andplug P, to push rod releasing position.

In the event that it is desired to lock the mechanism against automaticrelease and projection of push button member 40 and push rod 58 fromdepressed position upon rotation of spindle lil by either the inner knobunit or key operation of the cylinder plug P, it is only necessary afterdepressing button member M] to rotate that member to engage lug 46 overthe shoulder 45a of the bayonet-forming slot 45 of button mountingsleeve 4 l When it is desired to restore the mechanism to automaticreleasing functioning, the button member 43 may be turned to the normalposition with the lug 46 lined up with the longitudinal slot 431) ofsleeve 4 I.

In Fig. 4 of the drawings I have shown a modified form of the exampleembodiment of Figs. 1 to 3, in which the provision for releasablylooking the push button member 49 and push rod 50 against automaticrelease from spring catch arms 8%, is eliminated. In this example, thishas been efiected by eliminating from the button member mounting sleeve4|, the bayonet slot 45 for engagement by lug 46 of tube 53 of the innerknob unit I. If desired, the longitudinal slot 431) together with thelug 46 may be retained for maintaining button member 40 and sleeve 4!against rotation as the button and sleeve are reciprocated betweenprojected and depressed positions. In this form of the invention,therefor, the push rod 50 and button member 45] are always automaticallyreleased under all conditions from looking engagement by the catch armsfill in depressed position of the button member, whenever either theinner knob unit I is rotated to rotate the spindle ID or the catch arms80 are rotated by key operated rotation of the cylinder plug P of thecylinder lock mounted in the outer knob unit 0.

In another modified form of the invention, as shown in Fig. 5, I haveprovided a form of push rod 50' which eliminates the arrow head 83 ofthe push rod 50. The push rod 50 has the inner end length 83' thereofformed of substantially constant external diameter therealong. In thismodified form the springs 80 of the form of Figs. 1 through 3 may, ifdesired, be eliminated, as shown by Fig. 5. By utilizing such push rod50',

the automatic, releasable locking of the push rod in its projected,actuating button-depressed position, is eliminated. However, thearrangement of bayonet slot 45 in the button mounting sleeve M with thelug QB in tube 53 of the inner knob unit I, or some equivalentarrangement, is included for releasably locking the button in depressed,push rod projected position, by manual turning of the button. Inoperation, when it is desired to lock or dog the outer knob unit in itslocked position, declutched from spindle iii, the button member to isdepressed and then rotated a quarter turn to locked position. Afterdepression of button it, the outer knob unit 0 will remain looked underall conditions of opera-- tion of the spindle Ill by either inner knobor look rotation, until the button member lit is manually turned back tounlocked position for projection by the combined action of springs :35and 55. Projection of button member 48 retracts push rod t and therebyunlocks outer knob unit 0 and again clutches that unit to spindle It forlatch bolt retraction by rotation of the outer lznob unit. This modifiedform of Fig. 5 provides for functioning of the door lock unit in amanner which is referred to generally in the art as a vestibule action.

Except for the changes hereinabove described, the modified forms ofFigs. 4 and 5 are in all other respects identical with the exampleembodiment of Figs. 1 to 3.

Removable cylinder plug An important feature of the invention resides inthe design construction and arrangement of the cylinder lock unit andits cylinder plug P and actuator sleeve Ht, and in the combination ofsuch unit and its components with certain of the components of the doorlock unit or set, to permit of the efficient removal and replacements ofthe cylinder plug P.

In mounted and assembled position in the door lock units of the exampleembodiments, the cylinder plug P is constrained or restricted to amaximum range of rotation of approximately 140, that is, to a maximumrange substantially less than 180, so that the cylinder plug cannot berotated through a complete half turn of 180 to thereby align pin I withthe inner end of the longitudinal slot it formed by the rib portion itsof the cylinder body Iiiil. This limitation of the angular range throughwhich cylin der plug P may be rotated, is due to the engagement of teethH2 of actuator sleeve iIil with the teeth lid of head H5 on spindle iii,and to the connection of the spindle into the latch bolt unit L with thelimited reciprocation provided thereby for the latch bolt B.

The cylinder plug P is, however, readily and efiiciently removable fromthe cylinder body Iilil and the outer knob unit 0, without the use ofspecial keys or implements, special or otherwise, and in such a mannerthat neither the tumbler pins H3 in the plug, nor the driver pins I04 inthe driver case I ll I, will be displaced inadvertently from'theirreceiving bores.

In order to remove the cylinder plug P from the cylinder body I06 andthe outer door knob unit 0, the inside knob I is first removed byunscrewing it completely from spindle I0. The plate securing screws I2are then unthreaded from lugs 23 on arms H of locking plate 20 to detachback plate iI and lock plate 29. The outside knob unit 0 is then drawnoutwardly from the door D to remove therewith as a unit the spindle It,lock plate 2%! and the associated mechanism. The outside knob unit 0with its attached mechanism is then held in an upside down position withthe marker A which is provided on shank ti, as shown in Fig. 1, invisible position at the upper side of the shank. The locking plate 2b isthen lined-up so that the ball receiving recesses I8 thereof will be inpositions in a plane midway between the vertical and the horizontal, topermit the locking balls 16 to enter the recesses.

With the outer knob unit 0 held in the foregoing position, the push rod59 is then depressed by pressing upon the outer, free end thereof, andwhile the push rod is thus depressed, the spindle I ii is twisted orrotated in either direction to thereby release the clutch sleeve Illwith resulting release of this sleeve for rotation. A key for thecylinder lock unit may then be inserted in normal position in the keyslot K of plug P to set the tumbler pins I23 and driver pins Hi l tounlock and release the cylinder plug for rotation in the cylinder bodyIto.

The key is then turned to rotate cylinder plug 1 P and its actuatorsleeve III! through until plug pin lid is lined-up with the slot lot incylinder body NW at the inner end of that slot. During such rotation itis or" importance to note that the actuator sleeve IIil is rotated toposition the closed side wall thereof over and across the driver pinbores It?) which open into passage I02 of the cylinder body, so that theactuator sleeve Ht then functions as a guard or retainer to preventdisplacement of these spring loaded pins. During the rotation of thecylinder plug P, the tumbler pins iZZ of the rib portion I2I of the plugwhich is received in slot III of actuator sleeve IIb, are closed againsttumbler pin displacement by the side wall of body Iiiil. In order toprevent displacement of the tumbler pins I23 from their bores into thegroove I65 of cylinder body we when the cylinder plug P is rotatedthrough its half turn with rib portion I2! linedup with and along slotItii, I have provided a removable wedge strip W within slot I96 tocompletel occupy that slot from end to end thereof with the innersurface defining bore M2 at opposite sides of the groove Hit. Thus, whenthe cylinder plug P has been rotated through the half-turn from normalposition to position with pin I25lined up with groove Iilii, the tumblerpins I 23 are retained against displacement by the wedge strip W. Fromthis position, the cylinder plug P may then be drawn outwardly with pinI25 sliding through groove Itfi, the wedge strip W being of courselocated on the upper side of the plug and being withdrawn therewith andbeing held by the fingers in position over the tumbler pin bores untilthe plug is completely removed.

In the present example, in order to insure against the inadvertentwithdrawal of the sleeve H5 from the cylinder body when the cylinderplug P is withdrawn, 1 have provided the sleeve with a small projectionlit-0i for arresting engagement with the rear or inner edge portion ofthe cylinder body which surrounds the bore therethrough. 'ihisprojection il ia is shown in Figs. 2 and 17, and is located on thesleeve intermediate the inner end of the sleeve and the inner end of thecylinder body when the sleeve is in assembled, cylinder plug receivingposition in the cylinder body. In such assembled position the 7projection Iifia is located at the under side of 0 the sleeve spaced adistance inwardly from the it? inner or rear end of the cylinder body.When the cylinder plug P and sleeve 1 it are rotated to position withthe pin I25 in line with groove E66, the sleeve projection is rotated toposition to engage the inner edge portion of the cylinder body in theevent that the sleeve should be withdrawn with the plug, so as to insureagainst complete withdrawal of the sleeve from the cylinder body. In theinitial assembly of the lock unit the sleeve I it may be inserted intoposition from the outer end of the cylinder body through the bore I32 byaligning the projection l Ida with the body groove it, then after theprojection is clear of the groove at the inner end of the body, rotatingthe sleeve to its proper assembled position with the slot Ill uppermostand the projection then in position to engage the cylinder body andprevent inadvertent withdrawal of the sleeve.

After cylinder plug P has been reloaded with the desired combination oftumbler pins, the reloaded plug may be readily replaced in the cylinderbody Hit by placing a wedge strip W over the tumbler pin bores andinserting the plug and wedge into the cylinder body with the wedge andpin 525 sliding through and along groove H36 of the cylinder body. Afterthe plug P is in fully inserted position it may be then rotated through180 to its normal position of assembly with pin I25 engaged against theinner edge portion of the cylinder body 63. The key may then be removedand spindle H3 turned in the proper direction to engage the clutchsleeve 16 with the spindle. The spindle it may then be inserted throughdoor opening 2 and through the latch bolt unit L in the usual manner ofassembly. The fastening screws l2 may then be inserted to position andscrewed up to clamp plates [I and 20 in pos'tion against the door, afterwhich the inner knob unit I is screwed onto the inner end of the spindleto complete the reassembly and remounting of the lock unit on the door.

No claim is made herein to the cylinder lock unit per se as such unitand the arrangement and. construction thereof are claimed in my pendingapplication Serial No. 259,565, filed December 3, 1951, as a division ofthis present application.

The design and construction of the cylinder lock unit comprsed by bodyI80, actuator sleeve H0, cylinder plug P, and wedge strip W, is shown inan adaptation thereof for the combination with the particular door lockunits or sets of the e;:ample embodiments. However, it is to beunderstood that the various features of the removable plug of theinvention are not restricted to the example adaptation, as such featuresare capable of other adaptations to cylinder locks generally, and theinvention contemplates and includes such adaptations.

It will also be evident to those skilled in the art, that variouschanges, modifications, substituti ons, eliminations and additions maybe resorted to without departing from the broad spirit and scope of myinvention, and, hence, it is not my intention to limit the invention inall respects to the exact and specific disclosures of the exampleembodiments herein illustrated and described, except as may be requiredby clearly intended specific limitations thereto included in any of theappended claims.

What I claim is:

1. In a door lock, in combination; a latch bolt retracting spindle; aninner knob mounted on said spindle; an outer knob mounted on saidspindle for rotation independently thereof; a clutch sleeve mounted onsaid spindle for move- 20 ment in either direction axially thereof; aclutch member on said outer knob for clutching engagement by said clutchsleeve in one position thereof and for disengagement therefrom inanother position thereof; a push button member reciprocally mounted insaid inner knob; said spindle being provided with an axial boretherethrough; a push rod reciprocally mounted in said spindle bore andbeing attached at its outer end to said push button member; and saidpush rod being operatively connected to said clutch sleeve for movingsaid sleeve under the control of said push button member to and fromclutching engagement with said outer knob clutch member.

2. In a door lock unit, in combination; a latch bolt retracting spindle;an inner knob mounted on said spindle; an outer knob mounted on saidspindle for rotation independently thereof; a clutch operable topositions to connect said outer knob with or disconnect said knob fromsaid spindle; a manually operable member mounted in said inner knob andbeing operatively conected with said clutch for selectively operatingthe clutch to outer knob connecting or disconnecting positions; biasingmeans continuously biasing said manually operable member to positionwith said clutch in position connecting said outer knob with saidspindle member; means adapted to hold said clutch in outer knobdisconnecting position; and said last named means being operableautomatically by rotation of said spindle member to release said clutchfor biasing to its position connecting said outer knob with sa d spindlemember.

3. In a door lock, in combination; a latch bolt retracting spindle; aninner knob mounted thereon; an outer knob mounted on said spindle forrotation independently thereof; a clutch sleeve slidably mounted on saidspindle within sa'd outer knob; a clutch member on said outer knobadapted to be engaged and disengaged by said clutch sleeve to connectand disconnect said outer knob from said spindle; manually operablemeans on said inner knob operatively connected with said clutch sleeve;biasing means connected with said manually operable means and beingadapted to continuously bias said member to position with said clutchsleeve engaged with said outer knob clutch member; catch means adaptedto be automatically engaged by and to releasably hold said manuallyoperable means in positon with said clutch sleeve in position disengagedfrom said outer knob clutch member; and said catch means being adaptedto automatically release said manually operable means upon rotation ineither direction of said latch bolt retracting spndlc.

4. In a door lock unit, in combination; a latch bolt retracting spindle;an inner knob mounted on said spindle; a fixed lock plate; an outer knobjournaled in said look plate, said spindle being extended axiallythrough said lock plate into said outer knob; a sleeve member mounted onsaid spindle within said outer knob for reciprocation on said spindle;locking members operable by reciprocation of said sleeve member betweenpositions locking said outer knob to said lock plate against andreleasing said knob for rotation; a push button reciprocally mounted insaid inner knob; a push rod connecting said push button with said sleevemember; means adapted to continuously bias said push button to positionwith said sleeve member releasing said locking members from latchingengagement with said lock plate; and means for releasably holding saidpush rod and sleeve member in position with saidlocking members inlooking position to maintain said outer knob against rotation.

5. In a door lock unit, in combination; .a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle for rotation therewith; afixed lock plate; an outer knob rotatably mounted in said lock plate,said spindle being extended through said lock plate and into said outerknob axially thereof; a sleeve member mounted on said spindle withinsaid outer knob for reciprocation on said spindle; locking membersmounted in said outer knob for movements radially to and from lockingpositions engaged with said lock plate; said sleeve member being adaptedto engage said locking members to move said members in one position ofsaid sleeve into locking engagement with said plate and in anotherposition of said sleeve to release said, members from locking position;a push button reciprocally mounted in said inner knob; a push rodconnecting said push button with said sleeve member; means adapted tocontinuously bias said push button to position with said sleeve memberreleasing said locking members from locking engagement with said lockplate; and means for releasably holdingsaid push rod and sleeve memberin position with said looking members in locking engagement with saidlock plate.

6. In a door lock .unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; a fixed lock plate; anouter knob rotatably mounted in said lock plate, said spindle beingextended through said plate and into said outer knob axially thereof; aclutch sleeve reciprocally mounted on said spindle within said outerknob; a clutchmember mounted on said outer knob and being adapted to beengaged by said clutch sleeve in one position of said sleeve to connectsaid knob with said spindle and to be disengaged from said sleeve inanother position of the sleeve; locking members mounted in said outerknob and being adapted to be moved radially to and from outer knoblocking engagement with said lock plate by reciprocation of said clutchsleeve; said locking members being adapted to be moved to lockingposition by movement of said clutch sleeve from position engaged withsaid clutch member and to be released for displacement from lockingposition by movement of said clutch sleeve to position engaged with saidclutch member; a push, button reciprocally mounted in said inner knob; apush rod connecting said push button with said clutch sleeve; meansadapted to continuously bias said push button to position with saidclutch sleeve engaged with said clutch member; and means forreleasablyholding said push rod and clutch sleeve in position disengaged from saidclutch member and with said locking members in looking engagement withsaid lock plate.

7. In a doorlock unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle for rotation therewith; afixed lock plate; an outer knob rotatably mounted in said lock plate,said spindle being extended through said lock plate into said outer knobaxially thereof and being rotatable independently of said outer knob; aclutch sleeve reciprocally mounted on said spindle within said outerknob;

a clutch member mounted in said outer knob adapted to be engaged by saidclutch sleeve to connect said knob to said spindle in one position ofthe sleeve and adapted to be disengaged from said clutch sleeve todisconnect said knob from said spindle in, another position of thesleeve; locking members mounted in said outer knob for movements to andfrom locking positions engaged with said lock plate to latch and unlatchsaid outer knob from said spindle; said locking members being engageablewith said clutch sleeve and being adapted to be moved to lockingpositions by movement of said sleeve to position disengaged from saidclutch member and to positions released from said lock plate by saidclutch sleeve when in position engaged with said clutch member; andmanually operable means mounted on said inner knob and being operativelycoupled with said clutch sleeve for selectively operating said sleeve.

8. In a door lock unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; a fixed lock platehaving a hub portion, said hub portion and plate having an axial boretherethrough, and said hub portion being provided with spaced recessestherein opening into said bore; an outer knob having a hubforming sleeverotatably mounted in and extended through said lock plate hub portion;saidispindle being extended through the bore of said lock plate and hubportion and axially into said hubforming sleeve of the outer knob andbeing rotatable independently of said knob sleeve and said lock plate; asleeve member reciprocally mounted on said spindle within said outerknob sleeve; said knob sleeve being provided with radially disposedbores therethrough; locking ball members mounted in said sleeve boresfor movements therein; said sleeve member being formed to force saidball members outwardly through said knob sleeve bores to lockingengagement in said lock plate hub recesses, respectively, when in oneposition on said spindle and being formed to release said ball membersfor movements inwardly through said sleeve bores to positions disengagedfrom said lock plate hub recesses when in another position on saidspindle; and clutch means adapted to be actuated by reciprocation ofsaid sleeve member to connect and disconnect said outer knob andspindle.

9. In the combination as defined in claim 8, manually operable meansmounted on said inner knob and being operatively connected with saidsleeve member for reciprocating said member on said spindle.

10. In the combination as defined in claim 8, said spindle beingprovided with an axial bore therethrough, a push rod reciprocallymounted in said bore and being connected at one end thereof to saidsleeve member, the opposite end of said push rod being extended intosaid inner knob, and a push button reciprocally mounted in said innerknob and being connected with the adjacent end of said push rod.

11. In a door lock unit, in combination; a rotary spindle; an inner knobmounted on said spindle; a fixed lock plate having a bore therethroughand being provided with recesses therein at opposite sides of andopening into said bore; an outer knob having an insert sleeve rotatablymounted in said lock plate in position extended through the bore of saidplate, said spindle being extended axially into said insert sleeve ofthe outer knob and being rotatable independently of said sleeve; aclutch sleeve reciprocally mounted on said spindle within said knobinsert sleeve and being adapted to be moved inwardly into clutchingengagement with said insert sleeve to connect said outer knob to saidspindle and being movable outwardly on said spindle to position aeeaesrengaged from said outer knob insert sleeve; said clutch sleeeve beingalso formed for"receiving said ball members in positions moved inwardlythrough said bores out of engagement with said lock plate recesses whensaid clutch sleeve is moved outwardly to position engaged with saidinsert sleeve; and manually operablenieans connected'with said fclutchsleeve for selectively moving said sleeve between positions engaged withand disengaged from said outerknob insert sleeve.

"12: In a door lock unit, in combination; a latch bolt'retracting,rotary spindle; an inner knob mounted on said spindle: an outer knobmounted for rotation; said spindle being extended axially into saidouter knob and being adapted to be rotated independently thereof; aclutch operable to position engaging said outer knob with said spindleand to positiondisengagingsaid spindle fromsaid'outer knob; 'meansoperatively associatedwith said clutch andbeing adapted to be actuatedthereby to lock said outer knob against rotation when'said clutch is inposition disengaging said knob' from said spindle and to unlock-andrelease said knob when said clutch is in position connecting said knobwith the spindle; a manually operable push button mounted in said innerknob; a push rod extended from said push button to and being.operatively connected with said clutch for selective operation of thelatter by said push button; a cylinder lock unit mounted in said outerknob and including a key operable cylinder plug therein; and anactuating member adapted to operatively connect said cylinder plug withsaid spindle for rotation of the latter by key rotation of said cylinderplug when said outer knob is locked against rotation by said clutchoperated locking means.

13. In a door lock unit in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; a fixed lock plate; anouter knob rotatably mounted in said lock plate; said spindle beingextended axially into said outer knob; a clutch member mounted on saidspindle within said outer knob for reciprocation on the spindle betweena position engaged with said knob to connect the knob to the spindle anda position disconnected from said knob to free said spindle for rotationindependently of the knob; locking means connected with said spindlemounted clutch member for actuation thereby to lock said outer knob tosaid lock plate when said clutch member is disconnected from the knoband to release said knob from said lock plate when said clutch member isengaged with the knob; a lock unit mounted in said outer knob andincluding a key rotatable cylinder plug therein; and actuating meansconnected with said cylinder plug and being adapted to engage saidspindle for rotating the spindle upon key rotation of said cylinderplug.

14. In a door lock unit, in combination; a latch boltwetracting,rotaryspindle; an inner knob mounted onsaid spindle; a fixed'lock plate havinga bore therethrough of greater diameter than said spindle, said spindlebeing extended axially through said lock plate; an outer knob includ-'ing'an insert sleeve disposed axially thereof and being rotatablymounted in and extended through said latch plate bore between andconcentric with said'spindle and said plate; a clutch sleevereciprocally mounted on said spindle within said outer knob insertsleeve; said insert sleeve being provided with a clutch member adaptedto be engaged by' said sleeve in one position thereof to connect saidknob to said spindle and to be dis-' engaged by said'clutch sleeve inanother position thereof to'disconnect said knob insert sleeve and saidspindle; locking means operatively connected with said clutch sleeve forlocking said insert sleeve to and unlocking the same from said lockplate, said locking means being adapted to be actuated by said clutchsleeve to lock said outer knob to said lock plate when said clutchsleeve is disconnected from said knob insert sleeve andito unlock saidknob from said lock plate when said clutch sleeve is engaged with saidinsert sleeve clutch member; manually operable means mounted in saidinner knob and being operatively connected with said clutch sleeve forselectively reciprocating said sleeve; a lock unit mounted in said outerknob and including 'a'key operable cylinder plug rotatably mountedthere'- in; and actuating means connected with said cylinder plug andbeing adapted to engage said spindle to rotate the latter'upon'keyrotation of said plug.

15. In a door lock unit, in'combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; a fixed lock platehaving a'bore therethrough; an outer knob rotatably mounted in the boreof said lock plate; said spindle being extended into said outer knobaxially thereof; a lock unit mounted in said outer knob and including akey operable cylinder plug rotatably mounted therein; actuating meansconnected with said cylinder plug and being adapted to engage and rotatesaid spindle upon key rotation of said cylinder plug; clutch means onsaid spindle within said outerknob adapted for selective operation toengage said knoband connect the knob to said spindle or to disengagesaid knob to disconnect the knob from the spindle; 'a push buttonreciprocally mounted in said inner knob; a push rod reciprocally mountedinand extending axially through said spindle; said push rod beingconnected at one end thereof to said'clutch means for actuating saidmeans by reciprocation of said rod and being connected at the oppositeend to said push button for reciprocation by said button; a spring catchmounted within said outer knob between the inner end of said spindle andsaid lock unit and being adapted to be releasably engaged by the innerend of said push rod upon reciprocation of that rod inwardly by saidpush button; and said spring catch being adapted to be actuated torelease said push rod upon rotation of said spindle; and biasing meansadapted to continuously bias said push button and said push rod in adirection to withdraw said push rod from said spring catch.

16. In a door lock unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; a fixed lock plate; anouter knob rotatably mounted in said lock plate; said spindle beingextended axially into said outer knob and being adapted for rotationinde- 25 pendently thereof; a clutch member mounted on said spindlewithin said outer knob for movements between a position engaged withsaid knob to connect the knob to the spindle and a position disconnectedwith said knob to free said spindle for rotation independently of theknob; means for locking said outer knob against rotation when saidclutch member is in position disengaged with said knob and for unlockingsaid outer knob when said clutch member is engaged with the knob; acylinder lock unit mounted in said outer knob and including a keyrotatable cylinder plug therein; tooth members on the inner end of saidspindle within said outer knob; an actuator sleeve connected with saidcylinder plug and being extended rearwardly therefrom into said outerknob; and said actuator sleeve being provided at its inner end withtooth members adapted upon key rotation of said cylinder plug to engagesaid spindle tooth members to thereby rotate said spindle.

17. In a door lock unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; a fixed lock plate; an

outer knob rotatably mounted in said lock plate;

said spindle being extended axially into said outer knob; a clutchmember movably mounted on said spindle within said outer knob and beingadapted in one position thereof to engage said knob to connect the knobwith said spindle and in another position thereof to disengage said knobto disconnect the knob from the spindle for rotation of the spindleindependently of the knob; locking means connected with said spindlemounted clutch member for actuation thereby to lock said outer knob tosaid lock plate when said clutch member is in position disengaged fromsaid knob and to unlock said knob from said lock plate when said clutchmember is engaged with the knob; a manually operable member mounted insaid inner knob; mechanism connecting said manually operable member withsaid spindle mounted clutch member for selective movement of the latterto either of its aforesaid positions; a cylinder lock unit mounted insaid outer knob and including a key rotatable cylinder plug therein;spaced tooth' members mounted on the inner end of said spindle withinsaid outer knob; an actuator member connected with and rotatable by saidcylinder plug and being extended inwardly therefrom-into said outerknob; and spaced tooth members on said actuator member adapted uponrotation of said latter member by said cylinder plug to engage saidspindle tooth members for rotation of said spindle.

18. In a door lock unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle; an outer knob rotatablymounted independently of said spindle and said spindle being extendedaxially thereinto for rotation independently of said knob; a clutchmember movably mounted on said spindle within said outer knob and beingadapted in one position thereof to engage and connect said outer knobwith said spindle and in another position to be disengaged from saidspindle to release said spindle for independent rotation; a push rodreciprocally mounted in and extending through said spindle with one endthereof being extended into said inner knob and the other end thereofbeing extended beyond the adjacent end of said spindle into said outerknob; said clutch member being connected with said push rod and beingadapted to be moved thereby to and from positions engaged and disengagedwith said outer knob; a push button reciprocally mounted in said innerknob and being connected with the adjacent end of said push rod forreciprocating said rod; a cylinder lock unit mounted in said outer knoband including a key rotatable cylinder plug therein; tooth membersmounted on the end of said spindle within said outer knob; an actuatorsleeve connected with said cylinder plug and being extended inwardlytherefrom in axial alignment with said spindle; said actuator sleevebeing provided at its inner end with tooth members adapted to engagesaid spindle tooth members when said actuator sleeve is rotated by keyrotation of said cylinder plug.

19. In the combination as defined in claim 18; a spring catch mounted insaid actuator sleeve and being adapted to releasably engage the innerend of said push rod when said rod is actuated to move said clutchmember to position disengaged from said outer knob.

20. In the combination as defined in claim 18; biasing means adapted tocontinuously bias the push button and push rod into position with saidclutch member engaged with said outer knob; and a spring catch mountedin said outer knob and being adapted to engage and releasably hold theadjacent end of said push rod when said rod is in position with saidclutch sleeve disengaged from said outer knob.

21. In the combination as defined in claim 18; a spring catch mounted inand rotatable with said actuator sleeve and being adapted to releasablyengage and hold said push rod when the latter is in position with saidclutch member disengaged from said outer knob and when said cylinderplug is in normal locking position; and said spring catch and push rodend being constructed and arranged for automatic release of said pushrod upon relative rotation between said push rod and spring catch.

22. In a door lock, in combination; a spindle having external threadingand an axial bore therethrough; a knob unit threaded on to said spindle;a push rod reciprocally mounted in said spindle bore and being extendedinto said knob unit; a push button unit reciprocally mounted in saidknob unit in axial alignment with said push rod; said push rod beingprovided with external threading thereon having the same lead as theexternal threading of said spindle; and said push button unit beingthreaded onto said push rod to connect said push rod to said buttonunit.

23. In a door lock unit, in combination; a rotary spindle provided withexternal threading thereon and having an axial bore therethrough; ahollow knob unit threaded onto said spindle; a push rod reciprocallymounted in said spindle bore and being extended into said knob unit,said push rod being formed with an enlarged diameter head within saidknob unit having external threading thereon of the same lead as the leadof the external threading on said spindle; a push button unit threadedon said externally threaded head; and a biasing spring mounted on saidpush rod between said enlarged diameter head and the adjacent end ofsaid spindle within said knob unit.

24. In a door lock unit, in combination, a rotary spindle provided withexternal threading and having an axial bore therethrough; a hollow knobunit having a hub insert provided with an internally threaded boretherethrough threaded onto said spindle; a push rod reciprocally mountedin said spindle bore and being extended into said knob unit, the end ofsaid push rod within said knob unit being provided with an enlargeddiameterhead having externalthreading of the same lead as the lead ofthe external threading of. said spindle; the external diameter ofthethreading of said head being less than the internal diameter of thethreading in said knob insert bore; said knob unit having a boretherethrough in the outer side thereof in axial alignment with said pushrod; a tube member mounted on said hub insert and being extendedtherefrom in position surrounding said spindle; a 'push button unitreciprocally mounted in said tube member and being extended through saidknob unit bore; and said push button unit being threaded onto saidexternally threaded head of said push rod.

25.. In combination, in a door latch unit; a rotary spindle; a fixedlock plate having a bore therethrough; a knob having an insert sleeverotatably mounted in said lock plate bore; said spindle being extendedaxially into said insert sleeveof said knob for rotation independentlythereof; a camming sleeve member mountedon the exterior of, said spindlefor rotation therewith and being also mounted for reciprocation on saidspindle within said knob insert sleeve independently of the spindle;said insert sleeve being formed with bores disposed radially throughcpposite sides thereof at opposite sides of said camming sleeve member;ballmembers'moun'ted in said insert sleeve bores; said lock plate beingformed with recesses therein opening into said lock plate bore atopposite sides of said knob insert sleeve for alignment with said insertsleeve bores; said camming sleeve member in One position thereof on saidspindle being adapted to'c'am said ball members outwardly into lockingengagement in said insert sleeve bores and said lock plate recesses tolock said knob against rotation and in another position thereof beingadapted to release said balls for inward movement to positionsdisengaged from said lock'plate recesses to release said knob forrotation; and said camming member in the position thereof releasing saidball members to release said knob for rotation being adapted to engageand connect said insert sleeve with said spindle for rotation of saidspindle by said knob.

V 26. In the combination as defined in claim 25, manually operable meansfor reciprocating said camming sleeve member selectively to either aposition cainniing or a position releasing said ball members.

27. In the combination as defined in claim'25, manually operable meansfor selectively reciprocating said camming sleeve member; biasing meansadapted to continuously bias said camming'sleeve member to positionreleasing'said ball members from looking engagement with said lockplate; and means for releasably holding said camming sleeve member inthe position thereof oamming said ball members into locking engagementwith said lock plate.

28. In combination, in'a door latch unit; a rotary spindle; a fixed lookplate having a bore therethrough; a knob having an insert sleevejournalled in said lock plate bore; said spindle being extended axiallyinto said insert sleeve of said knob forrotation indep t y. t reof;camming sleeve member reciprocally mounted on said spindle forreciprocation thereon within said knob insert sleeve; said insert sleevebeing formed with bores disposed radially through opposite sides thereofat the oppositesidesof said camming sleeve member; ball members mountedin said insert sleeve bores; said lock plate. being formed with recessestherein opening into said lock plate bore at opposite sides of said knobinsert sleeve for alignment with said insert sleeve bores; said cammingsleeve member in one positionthereof on said spindle being adapted tocam said balls outwardly into locking engagement in said insert sleevebores and said lock plate recesses and in anotherposition thereof beingadapted to, release said ball members for inward movements to' positionsdisengaged from said lock plate recesses to release said knob forrotation; and said camming sleeve member being also formed to engagesaid knob insert sleeve to. connect said sleeve to said spindle whensaid camming sleeve member is in position releasing said ball membersfrom looking engagement in said lock plate recesses.

29. In a door lock unit, in combination; a latch bolt retracting, rotaryspindle; an inner knob mounted on said spindle for rotating the spindle;an outer knob rotatably mounted independently of but receiving thereinthe said spindle; a clutch sleeve reciprocally mounted on said spindle;a fixed locking member; movable locking means connected with said clutchsleeve and being operable to position engaged with said fixed lockingmember to lock said outer knob against rotation in one position of saidclutch sleeve and being operable to position disengaged from said fixedlocking member to release said outer knob for rotation in anotherposition of said clutch sleeve; said clutch sleeve and said outer knobeach being formed with fixed members thereon adapted to be interengagedto lock said outer knob with said spindle when said clutch sleeve is inposition with the outer knob released by said movable locking means andto be disengaged when said clutch sleeve is in position with the outerknob locked by said movable locking means; and manually operable meansconnected with said clutch sleeve for selectively reciprocating saidsleeve between position engaged with and position disengaged from saidouter knob.

GO'I'IHARD HAGSTROM.

